configs/imx6ulevk: Bump the kernel version

Bump the kernel version to 5.4.8.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

configs/imx6ulevk_defconfig

@@ -3,8 +3,8 @@ BR2_arm=y
 BR2_cortex_a7=y
 BR2_ARM_FPU_NEON_VFPV4=y
 
-# Linux headers same as kernel, a 4.18 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_18=y
+# Linux headers same as kernel, a 5.4 series
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_4=y
 
 # system
 BR2_TARGET_GENERIC_GETTY_PORT="ttymxc0"
@@ -12,7 +12,7 @@ BR2_TARGET_GENERIC_GETTY_PORT="ttymxc0"
 # kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.18.11"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.4.8"
 BR2_LINUX_KERNEL_DEFCONFIG="imx_v6_v7"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="imx6ul-14x14-evk"